I love the simpler, faster rules of Car Wars Fifth Edition, but its one weakness is its lack of vehicle design rules. I wanted my friends to be able to make their own cars for autoduels, so I reverse engineered the cars from all the 5e books to figure out the cost/weight/space of all the various components. I printed up my 5e vehicle design instructions and made copies for my friends. I thought I'd post them here in case anyone out there might find them useful.

A car with power equal to or greater than its weight will accelerate 10 mph and have a top speed of 90 mph. A car with power equal to or greater than twice its weight will accelerate 20 mph and have a top speed of 100 mph.